Hydraulic master cylinder switch

Details Hydraulic master cylinder switch Hydraulic master cylinder switch

1993-04-02

1994-08-30

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

H01H 314

Patent

active

053430050

ABSTRACT:
A switch mounted on the push rod of a master cylinder assembly and controlling in sequence several switches such, for example, as a cruise control switch, an electronic fuel injection switch, and a start interlock switch. The switch includes a hollow housing defining a central chamber through which the push rod passes and a plunger assembly carried by the push rod and mounted for axial movement within the chamber. The plunger assembly includes a primary plunger and a secondary plunger carried by and movable axially relative to the primary plunger. The initial portion of the forward movement of the push rod allows incremental forward movement of the secondary plunger to actuate a first series of switches whereafter the push rod moves further forwardly without either plunger whereafter the push rod engages the primary plunger to move the plunger assembly forwardly to actuate a further switch. The lost or relative movement between the push rod and the plunger assembly allows the switch housing to be significantly shortened and thereby allows the switch to be utilized on relatively short push rods.

REFERENCES:
patent: 2006690 (1935-07-01), Blake
patent: 2222765 (1940-11-01), Geyer
patent: 3487183 (1969-12-01), Schulman
patent: 4742193 (1988-05-01), Kassin et al.

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